CN219809061U - End cone and hot end assembly of engine exhaust system - Google Patents
End cone and hot end assembly of engine exhaust system Download PDFInfo
- Publication number
- CN219809061U CN219809061U CN202321398074.6U CN202321398074U CN219809061U CN 219809061 U CN219809061 U CN 219809061U CN 202321398074 U CN202321398074 U CN 202321398074U CN 219809061 U CN219809061 U CN 219809061U
- Authority
- CN
- China
- Prior art keywords
- end cone
- assembly
- cone
- barrier coating
- engine exhaust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000003054 catalyst Substances 0.000 claims abstract description 33
- 239000012720 thermal barrier coating Substances 0.000 claims abstract description 18
- 239000007769 metal material Substances 0.000 claims abstract description 6
- 230000007704 transition Effects 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 8
- 238000000576 coating method Methods 0.000 abstract description 8
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000004321 preservation Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 7
- 238000009413 insulation Methods 0.000 description 7
- 230000000630 rising effect Effects 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000003618 dip coating Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
- Exhaust Silencers (AREA)
Abstract
An end cone for use in an engine exhaust system includes a base made of a metallic material. The base includes an inner surface and an outer surface opposite the inner surface. The end cone further includes a thermal barrier coating directly or indirectly overlying at least a portion of the inner surface. The thermal barrier coating is configured to be in direct contact with the exhaust gas of the engine. The thermal conductivity of the thermal barrier coating is less than the thermal conductivity of the base. The utility model also discloses a hot end component of the engine exhaust system with the end cone. Compared with the prior art, the end cone is provided with the heat-insulating coating, so that heat dissipation is reduced, and heat preservation performance is improved. In the cold starting process of the vehicle, the end cone design of the utility model can enable the catalyst carrier to quickly reach the ignition temperature, and finally, the cold starting time of the vehicle is reduced.
Description
Technical Field
The utility model relates to an end cone and a hot end component of an engine exhaust system, and belongs to the technical field of engine exhaust systems.
Background
During cold start of the vehicle, the heat of the air flow generated from the engine is transferred to the catalyst carrier through the pipe or cone structure for gas catalytic treatment. The catalyst carrier can catalyze and convert harmful components in the tail gas of the engine when reaching the ignition temperature (working temperature), thereby meeting the requirements of tail gas emission regulations. However, before the light-off temperature of the catalyst carrier is reached, it cannot work properly to treat the harmful components in the engine exhaust. At the same time, the heat of the air flow generated by the engine is diffused to the outside through the housing or the like before the light-off temperature of the catalyst carrier is reached, which certainly prolongs the time for the catalyst carrier to reach the light-off temperature in the case of cold start of the vehicle.
Disclosure of Invention
The utility model aims to provide an end cone with a good heat preservation effect and a hot end component of an engine exhaust system, so as to reduce the time of cold start of a vehicle and improve the catalytic conversion efficiency of a catalyst carrier.
In order to achieve the above purpose, the utility model adopts the following technical scheme: an end cone for use in an engine exhaust system, the end cone comprising a base made of a metallic material, the base comprising an inner surface and an outer surface opposite the inner surface, the end cone further comprising a thermal barrier coating directly or indirectly overlying at least a portion of the inner surface, the thermal barrier coating for direct contact with an engine exhaust, the thermal barrier coating having a thermal conductivity less than a thermal conductivity of the base.
As a further development of the utility model, the end cone comprises a transition layer directly overlying the inner surface, the heat-insulating coating directly overlying the transition layer.
As a further improved technical scheme of the present utility model, the thermal insulation coating is formed on the transition layer by at least one of painting, spraying, spin coating and dip-coating.
As a further improved technical scheme of the utility model, the metal material is stainless steel.
As a further improved technical scheme of the utility model, the end cone is an air inlet end cone.
As a further improved technical solution of the utility model, the end cone comprises a first shell and a second shell which are mutually welded and fixed together.
As a further improved technical scheme of the utility model, a hot end component of an engine exhaust system comprises a catalyst component, a first end cone connected with one end of the catalyst component and positioned at the upstream of the catalyst component, and a second end cone connected with the other end of the catalyst component and positioned at the downstream of the catalyst component, wherein the catalyst component comprises a cylindrical shell and a catalyst carrier encapsulated in the shell, and the first end cone is the end cone.
As a further improved technical scheme of the utility model, the catalyst carrier is a gasoline particle catcher carrier.
As a further improved technical scheme of the utility model, the first end cone is welded and fixed with the shell.
As a further improved technical scheme of the utility model, the second end cone is welded and fixed with the shell.
Compared with the prior art, the end cone is provided with the thermal insulation coating, the thermal insulation coating is used for being in direct contact with exhaust gas of an engine, and the thermal conductivity of the thermal insulation coating is smaller than that of the base, so that heat dissipation is reduced, and the heat preservation performance is improved. In the cold starting process of the vehicle, the end cone design can delay heat dissipation of the cavity, increase the temperature rising rate of the cavity, enable the catalyst carrier to quickly reach the ignition temperature, and finally reduce the cold starting time of the vehicle.
Drawings
FIG. 1 is a schematic perspective view of a hot side assembly of an engine exhaust system according to one embodiment of the present utility model.
Fig. 2 is a schematic perspective view of another angle of fig. 1.
Fig. 3 is a schematic perspective view of the end cone of fig. 1.
Fig. 4 is a schematic perspective view of another angle of fig. 3.
Fig. 5 is a schematic perspective view of the further angle of fig. 3.
Fig. 6 is an exploded perspective view of fig. 5.
Fig. 7 is a schematic cross-sectional view of the end cone of the present utility model along its thickness direction.
Detailed Description
Specific embodiments of the present utility model will be described in detail below with reference to the attached drawings, wherein features of the embodiments may be combined with each other without conflict if several embodiments exist. When the description refers to the accompanying drawings, the same numbers or symbols in different drawings indicate the same or similar elements unless otherwise indicated. What is described in the following exemplary embodiments does not represent all embodiments of the utility model, but rather is merely an example of a product consistent with the utility model as set forth in the claims of the utility model.
The terminology used in the present utility model is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present utility model. It should be understood that words such as "first," "second," and the like, used in the description and in the claims of the present utility model, do not denote any order, quantity, or importance, but rather are names used to distinguish one feature from another.
Referring to fig. 1 to 7, the present utility model discloses a hot end assembly 100 of an engine exhaust system, which includes a catalyst assembly 3, a first end cone 1 connected to one end of the catalyst assembly 3 and located upstream of the catalyst assembly 3, and a second end cone 2 connected to the other end of the catalyst assembly 3 and located downstream of the catalyst assembly 3. The first end cone 1 is an air inlet end cone, and the second end cone 2 is an air outlet end cone. The upper concept of the air inlet end cone and/or the air outlet end cone is an end cone.
The catalyst assembly 3 includes a cylindrical housing 31 and a catalyst carrier (not shown) enclosed in the housing 31. In one embodiment of the utility model, the catalyst carrier is a gasoline particulate trap carrier.
The first end cone 1 is welded and fixed with the shell 31. The second end cone 2 is welded and fixed with the shell 31.
The end cone (e.g. the first end cone 1) comprises a base 11 made of a metallic material, which is stainless steel. The base 11 includes an inner surface 11a and an outer surface 11b opposite the inner surface 11 a. The end cone further comprises a thermal barrier coating 12 directly or indirectly overlying at least a portion of the inner surface 11a, the thermal barrier coating 12 being configured to be in direct contact with engine exhaust gases, the thermal barrier coating 12 having a thermal conductivity less than the thermal conductivity of the base 11.
In one embodiment of the utility model, the end cone comprises a transition layer 13 directly overlying the inner surface 11a, and the thermal barrier coating 12 directly overlies the transition layer 13.
The thermal barrier coating 12 is formed on the transition layer 13 by at least one of painting, spraying, spin coating, and dip-coating.
The end cone comprises a first housing 111 and a second housing 112 welded together.
In contrast to the prior art, the end cone of the present utility model is provided with a thermal barrier coating 12, said thermal barrier coating 12 being intended to be in direct contact with the exhaust gases of the engine, the thermal barrier coating 12 having a thermal conductivity which is less than the thermal conductivity of the base 11. In the process of transferring the air flow heat of the tail gas of the engine to the outside, the heat insulation coating 12 positioned on the inner wall of the end cone is contacted first, and the heat dissipation of the cavity can be delayed due to the small heat conductivity of the heat insulation coating 12, so that the temperature rising rate of the cavity is improved, and the heat insulation performance is improved. In the cold starting process of the vehicle, the end cone design can delay heat dissipation of the cavity, increase the temperature rising rate of the cavity, enable the catalyst carrier to quickly reach the ignition temperature, and finally reduce the cold starting time of the vehicle.
The above embodiments are only for illustrating the present utility model and not for limiting the technical solutions described in the present utility model, and it should be understood that the present utility model should be based on those skilled in the art, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the present utility model without departing from the spirit and scope of the present utility model and modifications thereof should be covered by the scope of the claims of the present utility model.
Claims (9)
1. An end cone for use in an engine exhaust system, the end cone comprising a base formed of a metallic material, the base comprising an inner surface and an outer surface opposite the inner surface, the end cone further comprising a thermal barrier coating directly or indirectly overlying at least a portion of the inner surface, the thermal barrier coating for direct contact with an engine exhaust, the thermal barrier coating having a thermal conductivity less than a thermal conductivity of the base.
2. The end cone of claim 1, wherein: the end cone includes a transition layer directly overlying the inner surface, and the thermal barrier coating directly overlies the transition layer.
3. The end cone of claim 1, wherein: the metal material is stainless steel.
4. The end cone of claim 1, wherein: the end cone is an air inlet end cone.
5. The end cone of claim 1, wherein: the end cone comprises a first shell and a second shell which are fixed together by welding.
6. A hot end assembly of an engine exhaust system, comprising a catalyst assembly, a first end cone connected to one end of the catalyst assembly and located upstream of the catalyst assembly, and a second end cone connected to the other end of the catalyst assembly and located downstream of the catalyst assembly, wherein the catalyst assembly comprises a cylindrical housing and a catalyst carrier enclosed in the housing, the first end cone being an end cone according to any one of claims 1 to 5.
7. The hot side assembly of claim 6, wherein: the catalyst carrier is a gasoline particle catcher carrier.
8. The hot side assembly of claim 6, wherein: the first end cone is welded and fixed with the shell.
9. The hot side assembly of claim 6, wherein: the second end cone is welded and fixed with the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321398074.6U CN219809061U (en) | 2023-06-02 | 2023-06-02 | End cone and hot end assembly of engine exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321398074.6U CN219809061U (en) | 2023-06-02 | 2023-06-02 | End cone and hot end assembly of engine exhaust system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219809061U true CN219809061U (en) | 2023-10-10 |
Family
ID=88209074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321398074.6U Active CN219809061U (en) | 2023-06-02 | 2023-06-02 | End cone and hot end assembly of engine exhaust system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219809061U (en) |
-
2023
- 2023-06-02 CN CN202321398074.6U patent/CN219809061U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |